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The Collared Brown Lemur (Eulemur collaris) is a medium-sized Strepsirhine primate and one of twelve species of brown lemur in the Lemuridae family. It is only found in south-eastern Madagascar. Like most species of lemur, it is arboreal, moving quadrupedally and occasionally leaping between trees. Like other brown lemurs, it lives in social groups, primarily eats fruit, is active both day and night, exhibits sexual dichromatism, and does not demonstrate female dominance. The species is listed as Vulnerable by the International Union for Conservation of Nature and is threatened primarily by habitat loss.

Together with the twelve other true lemurs (genus Eulemur), the Collared Brown Lemur (E. collaris) is a type of lemur belonging to the family Lemuridae. Collectively, lemurs (infraorder Lemuriformes) are classified as Strepsirhine primates. Originally listed as a subspecies of the Common Brown Lemur (E. fulvus), the Collared Brown Lemur was promoted to full species status in 2001 by biological anthropologist Colin Groves.

An adult Collared Brown Lemur can reach a head-body length of 39 and 40 cm (15 and 16 in) and have a tail length of 50 and 55 cm (20 and 22 in) for an overall length of 89 and 95 cm (35 and 37 in). (Read more...)